An employee has elected to have $200.00 per month contributed to a medical flexible spending account. At the end of the plan year's grace period, $100.00 remains in the account. What happens to the $100.00?

a. The amount becomes taxable income
b. The amount is forfeited by the employee
c. The amount can be carried over to the next plan year without amending the plan
d. The amount can be received in cash without taxation